Mitsubishi Electric AJ65BT-68TD, Руководство пользователя

Страница: 39 / 106

3. SPECIFICATIONS MELSEC-A
3-24
3.9.3 Detected temperature value
The measurable temperature range for the AJ65BT-68TD is between -200 °C and 1700 °C.
The temperature read by each channel is converted to a detected temperature value that has
undergone the linearize processing and cold junction compensation, and stored to the remote register.
The detected temperature value is measured to one decimal place and multiplied by 10, then stored
as a 16-bit signed BIN data.
If the detected temperature value is negative, it is stored as a complement of 2.
<When the detected temperature value is 123.025 [°C] ....... 1230 is stored.>
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0 1 0 0 1 1 0 0 1 1 1 0
<When the detected temperature value is -123.025 [°C] ...... -1230 is stored.>
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
1 1 1 1 1 0 1 1 0 0 1 1 0 0 1 0
3.9.4 Scaling value
The detected temperature value will be scaled to a value of 0 to 2000 within the set upper and lower
limit range, and stored.
The scaling value is stored as a 16-bit signed BIN data. Also, when processing the travel average, the
scaling value will be travel-averaged.
<When the scaling value is 1230 ........ 1230 is stored.>
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0 1 0 0 1 1 0 0 1 1 1 0
The calculation method for scaling value is shown below.
Scaling value = ––———––—––—————––———––——––——– × 2000
Example) If the high and low value setting range for the measured temperature of CH1 is 0 °C to
2000 °C (lower limit 0, upper limit 12000) and 100 °C (detected temperature value 1000) is
to be scaled:
Scaling Value =
1000 - 0
1200 - 0
2000
The first decimal digit will be rounded.
= 1666.6
= 1667
Stored in the remote register.
Detected temperature value – Lower limit value
Upper limit value – Lower limit value
Downloaded from ManualsNet.com search engine